对Android的承诺? [英] Promises for Android?

问题描述

您如何在Android中面对嵌套的回调?例如，在我的应用程序中，我使用Locations API，然后在拥有当前的lat-lng时，向服务器发送HTTP请求.在这种情况下，我有两个嵌套的回调.没那么糟，但是如果我有三个或三个以上怎么办?我已经在这个问题中 阅读了此书，但我想知道是否有类似Android的Promises之类的东西.

How do you face nested callbacks in Android? For example, in my app I use Locations API and then, when I have the current lat-lng, I do an HTTP request to my server. In this situation I have two nested callbacks. It's no so bad, but what If I had three or more? I've read about it in this question but I wonder if there are something like Promises for Android.

我发现的全部是此.有人对这个主题有更多的了解吗?

All I've found is this. Someone knows more about the subject?

推荐答案

作为Java语言的一部分，已经有一些非常相似的东西，并且受到Android的支持:

There is something pretty similar already available as part of the Java language, and supported by Android: java.util.concurrent.Future. Perhaps it is good enough for your needs.

顺便说一下，Android尚不支持的Java 8 具有一个名为

By the way, Java 8, which Android does not yet support, has a variant called CompletableFuture that is even closer to a Promise.

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